Carriers routinely resist efforts to compel production of the underwriting and claims files on other policyholders on the basis of relevance. Early last month in H.J. Heinz Co. v. Starr Surplus Lines Ins. Co., 2015 WL 5781295, 2015 U.S. Dist. LEXIS 138080, (W.D.Pa., Oct. 1, 2015), an insurer lost that fight when a federal court in Pennsylvania required it to produce the files. The case is noteworthy, but arguably limited in terms of its application to other disputes. A Phase One trial was directed solely to the insurer’s efforts to rescind the policy because of material misrepresentations in the application, and discovery addressing whether the insured was being treated the same way as other similarly-situated policyholders was uniquely important given…